EP0019014B1 - Ascenseur d'escalier - Google Patents

Ascenseur d'escalier Download PDF

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Publication number
EP0019014B1
EP0019014B1 EP79104918A EP79104918A EP0019014B1 EP 0019014 B1 EP0019014 B1 EP 0019014B1 EP 79104918 A EP79104918 A EP 79104918A EP 79104918 A EP79104918 A EP 79104918A EP 0019014 B1 EP0019014 B1 EP 0019014B1
Authority
EP
European Patent Office
Prior art keywords
supporting
staircase
spindle
guide
lifting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP79104918A
Other languages
German (de)
English (en)
Other versions
EP0019014A1 (fr
Inventor
Gerd Grass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hiro Lift Hillenkoetter and Ronsieck GmbH
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19792914350 external-priority patent/DE2914350C2/de
Priority claimed from DE19792946780 external-priority patent/DE2946780A1/de
Application filed by Individual filed Critical Individual
Publication of EP0019014A1 publication Critical patent/EP0019014A1/fr
Application granted granted Critical
Publication of EP0019014B1 publication Critical patent/EP0019014B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/06—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces
    • B66B9/08—Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces associated with stairways, e.g. for transporting disabled persons
    • B66B9/0807—Driving mechanisms
    • B66B9/0823—Screw and nut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
    • Y10T74/18648—Carriage surrounding, guided by, and primarily supported by member other than screw [e.g., linear guide, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19805—Less than 360 degrees of contact between nut and screw

Definitions

  • the invention relates to a stairlift with a load-bearing device designed as a platform or as a seat, which is mounted displaceably on support bars arranged along the stairs and can be driven by means of a spindle.
  • Such elevator or lift devices are used for example as disabled lifts and can be retrofitted in stairwells.
  • Disabled lifts are already known, in which chains, racks or ropes with support members are used as the support and traction means.
  • the guide rails along which the seat of such a stair elevator rolls are installed in a box or channel, which must be permanently installed in the stairwell.
  • Such a box takes up part of the width of the stairs and may block the passage to landing doors on landing.
  • such an elevator must have a safety device or a special brake. This can result in a double number of cables or chains.
  • These known elevators also have the disadvantage of a very complex construction technology.
  • the invention has for its object to provide a simply constructed stair lift that meets the safety requirements, requires only a significant amount of space for its load suspension device and does not reduce the free stair width and the platform space.
  • This object is achieved according to the invention in a stair lift of the aforementioned type on the one hand by providing a guide bar arranged along the stairs and inclined with respect to the support bars, on which a spindle nut which is in engagement with the drive spindle is mounted so as to be longitudinally displaceable, the drive spindle being mounted on the load-bearing device and is inclined towards both the support bars and the guide bar.
  • the object is achieved according to the invention in a stair lift of the aforementioned type on the other hand in that the drive spindle is inclined relative to the support bars on the load-bearing device and engages in the threads of an associated nut, the thread of which is angled and divided into several segment plates fixedly arranged along the stairs .
  • Such an embodiment is particularly suitable for long stairs, since any number of segment plates can be arranged fixedly at suitable intervals to the side of the stairs. Continuous pipes or the like running along the stairs. as separate guide rails can be omitted.
  • the support bars can replace the banister.
  • the pitch angle of the threads of the drive spindle as well as the angled threads (partial thread) of the nut as a guide device can be varied.
  • a low overall height of the elevator device can be maintained.
  • the drive spindle can also be arranged in a horizontal position.
  • An elevator device is installed in a staircase along a straight staircase 10 or along a helically curved staircase 11.
  • the elevator unit is supported on an upper support spar 12 and 13 and a lower support spar 14 and 15, respectively.
  • a guide bar 16 runs between the upper support bar 12 or 13 and the lower support bar 14 or 15 according to FIG. 1 of the drawing and a guide bar 17 according to FIG. 2 of the drawing. All bars 12, 14 and 16 or 13, 15 and 17 are arranged vertically one above the other and held by a lower support 18 or 19 on the lower landing and by an upper support 20 or 21 on the upper landing. These supports run vertically from floor to ceiling on one floor.
  • the guide bar 16 or 17 determines the position of the elevator unit along the stairs. It runs in each case at the lower end of the stairs 10 and 11 from the beginning of the lower support bar 14 and 15 to the end of the upper support bar 12 and 13 at the upper end of the stairs.
  • the support bars 12 and 15 and the guide bars 16 and 17 can be made of tubes.
  • the elevator unit contains a horizontal platform 22 with a vertical wall 23, on which a holding bracket 24 is arranged.
  • An approximately C-shaped guide profile 25 is fastened to the rear of the wall 23 with the aid of screw bolts 26.
  • the guide profile 25 is arranged vertically, there is a lower bracket 27 at its lower end and an upper bracket 28 is attached to its upper end.
  • These cantilevers run parallel to the support bars 12 to 15 and are provided at their free ends with support rollers, by means of which the elevator unit is supported on the support bars 12 and 14 or 13 and 15.
  • a lower support roller 29 and an upper support roller 30 opposite it with respect to the lower support beam 14 or 15.
  • at the free end of the upper arm 28 there is a lower support roller 31 and an upper support roller 32 arranged, which abut the upper support beam 12 or 13 on two opposite sides.
  • the upper support roller 30 is mounted with its horizontal swivel axis in each case in a swivel bearing with a vertical axis on the associated boom, while the lower support roller 29 is mounted on a swivel lever which can be rotated about the swivel axis of the support roller; 5 of the drawing, the upper support roller 30 is located with its pivot axis 33 on a bearing body 34 which is articulated on the boom 27 via a pivot bearing 35 with a vertical axis. On the bearing body 34, the pivot lever 36 is rotatably supported about the pivot axis 33, and the lower support roller 29 is rotatably supported at its free end.
  • the elevator unit thus hangs on its support rollers 29 to 32 on the support bars 12 and 14 or 13 and 15, along which it can travel.
  • the drive of the elevator device is located on the mobile elevator unit and is in engagement with the guide bar 16 or 17. It consists of a drive motor 37 arranged at the upper end of the guide profile 25, a downstream gear 38 and a vertical drive spindle 39 which is arranged within the guide profile 25 and is supported there with its ends. It is connected to the guide bar 16 and 17 via a support frame 40, a lower support roller 41 and an upper support roller 42.
  • a spindle nut 43 is screwed onto the drive spindle 39 as a guide device for the platform 22, the one the drive spindle. 39 surrounding bearing block 44 carries.
  • the axis 45 of the lower support roller 41 and a pivot lever 46 is inserted, at the free end of the upper support roller 42 is mounted with a horizontal axis 47.
  • the lower support roller 41 and the upper support roller 42 lie outside the guide profile 25 on two opposite sides of the guide bar 16 and 17 on this.
  • the bearing block 44 is located within the support frame 40, on which it is supported at its upper end and at its lower end, so that it has to move with it.
  • the support frame 40 is displaceable in the vertical direction within the guide profile 25. For this purpose, it has sliding shoes 48 on two vertical outer sides, which are fastened to the supporting frame 40 with the aid of screw bolts 49.
  • the bearing block 44 surrounding the drive spindle 39 is held in the radial direction on its underside by the spindle nut 43 and on its top by a second spindle nut 50. It has vertical bores which rest with their inner circular cylindrical surface on the outer surfaces of the spindle nut 43 and the second spindle nut 50. However, the bearing block 44 maintains a small distance from the second spindle nut 50 in the vertical direction. This distance is at the lower end of the spindle nut 50.
  • the support frame 40 which, like the bearing block 44, is held in the radial direction by the spindle nuts 43 and 50, also touches the second spindle nut 50 in the axial direction of the drive spindle 39 not immediately, but keeps a small distance from it.
  • the support frame 40 and the bearing block 44 are therefore held on the drive spindle 39 only via the spindle nut 43. However, should this become defective and fail, then the second spindle nut 50 takes over.
  • This arrangement of two spindle nuts 43 and 50 therefore offers a safety device so that the platform 22, which is designed as a load suspension device, is held even if the main spindle nut 43 fails.
  • the inclination of the upper support beam 12 and the lower support beam 14 at the beginning and at the end of the carriageway is variable, the support beams going from bottom to top in a transition region from the horizontal to a constantly inclined direction, which they adhere to along the course of the stairs and then change at the upper end in a transition area from the inclined to the horizontal direction. Since the inclination of the guide bar 16 is essentially constant, the support bars 12 and 14, which run at a different angle, result in a delayed travel speed of the elevator unit into the stops.
  • the use of the C-shaped guide profile provides further options for the way the lift is operated. If e.g. which is determined by the support bars 12 and 14 and the guide bar 16 according to FIG. 1 so that the bars 12 and 14 are vertical, the lift can travel in the vertical direction.
  • the C-shaped guide profile 25 and the drive spindle 39 keep their angular position with respect to the support bars 12 and 14, while the platform 22 is arranged relative to the guide profile 25 so that it is horizontal again. In a corresponding manner, a horizontal direction of movement of the elevator unit can be provided.
  • an elevator device is suspended from a guide which can simultaneously serve as a banister.
  • This guide consists of a lower guide bar 52 (support bar) extending along the staircase 10 and an upper guide bar 53 (support bar) running parallel thereto. These guide or support bars are supported and fastened to vertical supports 54 above the stairs 10 and on one side of these stairs. Between two successive supports 54, a plurality of vertical rungs 55 are attached to the guide rails 52 and 53 at equal intervals.
  • the load-bearing device of the elevator device to which a seat 56 is attached laterally and in the area of the stairs 10, is suspended on the two guide rails 52 and 53 in such a way that it can travel along it.
  • the guide bars 52 and 53 are formed from tubes with a circular cross section, so that support rollers 65, 66 can roll on them.
  • the load suspension device is designed as a frame with two vertical side struts 57, a lower cross strut 58, an upper cross strut 59, a lower connecting strut 60 and an upper connecting strut 61.
  • the suspension of the frame on the guide bars 52 and 53 is carried out via the connecting struts 60 and 61, and they each carry a plurality of idlers which can roll on the guide bars.
  • a vertical roller support plate 63 is pivotably mounted on each connecting strut 60 and 61 in a bearing 62 fixed there with a horizontal axis.
  • Two lower support rollers 65 and an upper support roller 66 are rotatably mounted on fixed bearing journals 64 protruding horizontally from this roller support plate 63.
  • the upper support roller 66 is supported above the guide rail 52 or 53 on the latter, while the two lower support rollers 65 are supported one behind the other in the direction of travel of the elevator device below the guide rail 52 or 53. In this way, the load-bearing device of the elevator device can adjust itself to slight deviations from their parallelism while traveling along the guide rails 52 and 53, because the support rollers 65 and 66 are each pivotably mounted on a pivotable roller support plate 63.
  • a motor 68 with a belt drive 69 is arranged in a motor housing 67 above the frame for driving the elevator device.
  • a worm gear or the like is used to transmit the drive torque. used. Therefore, a worm 73 is arranged on the drive spindle 70.
  • the toothing (the threads) of the worm 73 does not engage in a conventional worm wheel, but the counter toothing is unwound and thus the threads are divided into several segment plates 74 as a guide device, with each support 54 and rung 55 approximately in the middle between a segment plate 74, for example with screws 75, is fastened to the two guide rails 52 and 53.
  • the elevator device hangs on the guide bars 52 and 53 (support bars). Since the worm 73 is in engagement with the toothing (thread turns) of at least one segment plate 74 as a guiding device, the load-bearing device is held via the worm drive. According to the situation with a worm drive there is self-locking. It is therefore not possible for the load-carrying device to set the screw 73 in rotation due to its weight. As soon as the drive spindle 70 and with it the worm 73 is rotated, however, as a result of its engagement with the toothings (the thread turns) of the segment plates 74 of the load suspension device, they are forced to move along the guide bars 52 and 53 via their support rollers 65 and 66.
  • the operating mode of the motor 68 can control the person to be seated on the seat 56 and supported on the footrest 76 at a control desk 77.
  • the seat 56 can be dismantled in a simple manner and the footrest 76 and the control panel 77 can be easily folded up if the full width of the stairs is exceptionally required for the entire length for other transports.
  • the drive spindle 70 is arranged vertically with the worm 73.
  • the drive spindle is in any other direction, such as inclined or horizontal.
  • the elevator device according to the invention can also be designed as a tractor which pulls a plurality of load suspension devices, such as platforms or seats, arranged one behind the other along the guide rails 52 and 53, so that several people and / or objects can be transported simultaneously.
  • load suspension devices such as platforms or seats

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Types And Forms Of Lifts (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Claims (9)

1. Monte-escalier muni d'un dispositif récepteur de charge (22) conçu sous forme de plateforme ou de siège qui est monté de manière à pouvoir coulisser sur des longerons de soutien (12, 14) disposés de façon fixe le long de l'escalier (10) et peut être entraîné au moyen d'une tige filetée (39), caractérisé par le fait qu'il est prévu un longeron de guidage (16, 17) disposé le long de l'escalier, incliné relativement aux longerons de soutien (12, 14) et sur lequel est monté de manière à pouvoir coulisser longitudinalement un écrou (43) coopérant avec la tige filetée d'entrainement (39); la tige filetée d'entraînement (39) étant montée sur le dispositif récepteur de charge (22) et inclinée aussi bien relativement aux longerons de soutien (12, 14) que relativement au longeron de guidage (16, 17).
2. Monte-escalier selon la revendication 1, caractérisé par le fait que le dispositif récepteur de charge (22) et l'écrou (43) sont guidés, au moyen de galets porteurs (29-32, 41, 42), respectivement sur les longerons de soutien (12, 14) et sur le longeron de guidage (16).
3. Monte-escalier selon l'une des revendications 1 ou 2, caractérisé par le fait que l'écrou (43) est guidé sur le dispositif récepteur de charge (22, 23) au moyen d'un cadre porteur (40) pouvant coulisser, par des patins (48), à l'intérieur d'un profilé de guidage (25).
4. Monte-escalier selon les revendications 1 à 3, caractérisé par le fait que l'écrou (43) est soutenu sur le longeron de guidage (16, 17) au moyen de deux galets porteurs (41, 42) s'applicant à deux côtés du longeron de guidage (16, 17), le galet porteur inférieur (41) étant monté sur un support de palier (44) et le galet porteur supérieur (42) étant monté sur un levier pivotant (46) qui peut pivoter autour de l'axe (45) du galet porteur inférieur (41).
5. Monte-escalier selon les revendications 1 à 4, caractérisé par le fait qu'à l'intérieur du cadre support (40) est disposé le support de palier (44) entourant la tige filetée d'entraînement (39) et soutenant le cadre porteur (40), le support de palier s'appuyant sur l'écrou (43), et que sur la tige filetée d'entraînement (39) est disposé, au-dessus de l'écrou (43), un deuxième écrou (50) qui garde un petit espacement en direction axiale vis- à-vis du support de palier (44) et du cadre porteur (40).
6. Monte-escalier muni d'un dispositif récepteur de charge (56) conçu sous forme de plateforme ou de siège, qui est monté de manière à pouvoir coulisser sur des longerons de soutien (52, 53) disposé de façon fixe le long de l'escalier (10) et peut être entraîné au moyen d'une tige filetée (70, 73) caractérisé par le fait que la tige filetée d'entraînement (70, 73) est montée sur le dispositif récepteur de charge (56) avec inclinaison relativement aux longerons de soutien (52, 53) et s'engage dans les filets d'un écrou correspondant dont le filetage est déroulé et réparti sur plusieurs plaques de segment (74) disposées de façon fixe le long de l'escalier (10).
7. Monte-escalier selon la revendication 6 caractérisé par le fait que le dispositif récepteur de charge est conçu sous forme de cadre présentant deux contrefiches latérales verticales (57), une traverse horizontale inférieure (58), une traverse horizontale supérieure (59) et des contrefiches de liaison (60, 61) disposées entre celles-ci, les paliers (71, 72) de la tige filetée d'entraînement étant fixées aux traverses (58, 59) et le dispositif récepteur de charge s'appuyant, par l'intermédiaire de galets porteurs (65, 66), sur un longeron de guidage inférieur (52) et sur un longeron de guidage supérieur (53), qui s'étendent le long de l'escalier (10).
8. Monte-escalier selon les revendications 6 et 7, caractérisé par le fait qu'à chaque longeron de guidage (52, 53) sont adjoints un galet porteur supérieur (66) et deux galets porteurs inférieurs (65) qui sont chaque fois montés de manière à pouvoir tourner sur une plaque porte galets commune (63).
9. Monte-escalier selon les revendications 6 à 8, caractérisé par le fait que chacune des deux plaques porte-galets (63) est montée, de manière à pouvoir pivoter autour d'un axe horizontal, dans un palier (62) qui est fixé aux contrefiches de liaison correspondantes (60, 61).
EP79104918A 1979-04-09 1979-12-05 Ascenseur d'escalier Expired EP0019014B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2914350 1979-04-09
DE19792914350 DE2914350C2 (de) 1979-04-09 1979-04-09 Aufzugseinrichtung
DE2946780 1979-11-20
DE19792946780 DE2946780A1 (de) 1979-11-20 1979-11-20 Aufzugseinrichtung

Publications (2)

Publication Number Publication Date
EP0019014A1 EP0019014A1 (fr) 1980-11-26
EP0019014B1 true EP0019014B1 (fr) 1984-02-15

Family

ID=25778635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104918A Expired EP0019014B1 (fr) 1979-04-09 1979-12-05 Ascenseur d'escalier

Country Status (6)

Country Link
US (1) US4335805A (fr)
EP (1) EP0019014B1 (fr)
AT (1) AT375323B (fr)
DK (1) DK148939C (fr)
FI (1) FI68385C (fr)
NO (1) NO145071C (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3334476A1 (de) * 1983-09-21 1985-04-11 César Arth Rigert Foerdersystem zur ueberwindung von hoehenunterschieden
GB2157653A (en) * 1984-04-17 1985-10-30 Antony Stopher A stair lift
AT384200B (de) * 1985-06-11 1987-10-12 Robert Dipl Ing Dr Te Scheriau Stiegenlift
DE3602770A1 (de) * 1986-01-30 1987-08-13 Gerd Dipl Ing Grass Treppenaufzug
US4904916A (en) * 1988-05-18 1990-02-27 The Cheney Company Electrical control system for stairway wheelchair lift
DE4122855A1 (de) * 1991-02-14 1992-08-20 Hillenkoetter & Ronsieck Aufzug, insbesondere schraegaufzug
AU650103B2 (en) * 1991-03-20 1994-06-09 Lyster, Ann Veronica A stairlift
GB9111153D0 (en) * 1991-05-23 1991-07-17 Grorud Bison Bede Ltd Stairlift and rail for stairlift
NL9400832A (nl) * 1994-05-20 1996-01-02 Ooms Otto Bv Stoellift en stoeleenheid voor een dergelijke stoellift.
GB9511508D0 (en) * 1995-06-07 1995-08-02 Bison Bede Limited Lift apparatus
US5735088A (en) * 1996-05-06 1998-04-07 Agency Of Industrial Science & Technology, Ministry Of International Trade & Industry Staircase hoist for wheelchair users
US6082496A (en) * 1997-03-19 2000-07-04 Bovis; John Edric Stairlift skate
DE10011627C1 (de) * 2000-03-10 2001-10-25 Gerd Grass Antriebseinrichtung für Treppenaufzüge
WO2002064481A1 (fr) * 2001-02-12 2002-08-22 Stannah Stairlifts Limited Rail et chariot pour monte-escaliers
US7100334B2 (en) * 2003-05-27 2006-09-05 Ioannis Milios Conveyor for conveying people
CN105217419B (zh) * 2014-06-17 2017-12-15 郑永如 步行楼梯加装带式电梯
GB202010021D0 (en) * 2020-06-30 2020-08-12 Stannah Stairlifts Ltd Improvements in or relating to stairlifts

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
DE65109C (de) * J. E. A. AMIOT in Asnieres, 8 Rue Limandoux, Seine, Frankreich Treppenfahrstuhl
US1473813A (en) * 1921-10-04 1923-11-13 Crispen Clarence Cullen Elevator for stairways
US1838204A (en) * 1930-12-03 1931-12-29 Wood Henry A Wise Inclined elevator
US2270735A (en) * 1940-09-13 1942-01-20 Richard R Knudsen Screw and nut gearing
US2824623A (en) * 1954-08-02 1958-02-25 U S Automatic Corp Automatic stairway elevator
US2950948A (en) * 1959-11-23 1960-08-30 Hardigan Blanche Inclined staircase elevator
FR76881E (fr) * 1959-12-05 1961-12-15 élévateur
FR1543012A (fr) * 1967-10-24 1968-10-18 Dispositif de transformation d'un mouvement rotatif en une translation rectiligne, particulièrement pour le déplacement d'une charge
FR2247913A6 (en) * 1971-07-22 1975-05-09 Comabi Elevator formed of scaffolding frames - has ladder elements enclosing vert. operating screws
US3833092A (en) * 1973-04-04 1974-09-03 Flinchbaugh Murray Corp Transport mechanism for stairway elevator
DE2434009A1 (de) * 1974-07-15 1976-02-05 Steinert Elektromagnetbau Lift
US4174023A (en) * 1977-11-08 1979-11-13 Dooley Stephen J Stairlift

Also Published As

Publication number Publication date
FI794008A (fi) 1980-10-10
NO145071B (no) 1981-09-28
NO794296L (no) 1980-10-10
EP0019014A1 (fr) 1980-11-26
FI68385C (fi) 1985-09-10
DK46180A (da) 1980-10-10
DK148939B (da) 1985-11-25
DK148939C (da) 1986-05-26
US4335805A (en) 1982-06-22
AT375323B (de) 1984-07-25
ATA794579A (de) 1983-12-15
FI68385B (fi) 1985-05-31
NO145071C (no) 1982-01-06

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